Buyers Guide & Information

Best Air Purifier For Basements

We have reviewed & compared the top brands in purification to remove mold and musty smells.

Best Value for Money

Hathaspace HSP001
Hathaspace HSP001

Best Overall

Alen BreatheSmart Classic
Alen BreatheSmart Classic

Best Dehumidifier & Air Purifier

Tenergy Sorbi
Tenergy Sorbi

The Problem With Basements

Basements are particularly problematic for high air quality because they are a breeding ground for mold, dust, VOCs, and stagnant air. A lack of filtration in a humid environment with no airflow leads to poor air quality.

To combat this problem, moisture should be reduced, and an air purifier can create air circulation and filter out contaminants. Consider testing the quality of the air beforehand by using a home air test kit found here.

How Air Purifiers Help in Improving Basement Air

Basements are great for increasing a home’s overall square footage, but often they are so closed off that they become susceptible to damp, stagnant air. Fortunately, there is an easy way to increase airflow and circulation in your basement, while at the same time capturing allergens and mold spores.

Air purifiers work by using a fan to capture air and circulate it throughout the room. After the air is captured and recirculated, the air must pass through a filter or several filters. These filters capture and eliminate airborne particles that are common household pollutants.

Basement Air Purifiers Compared

ModelRoom AreaFilter LifeNoise LevelPrice
Alen Breathe Smart Classic1100 Sq. ft.12 months42 – 56 dBaCheck Alencorp

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Coway Airmega 4001560 Sq. ft.12 months22 – 55 dBaCheck Sylvane

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Winix 5500-2360 Sq. ft.12 months27 – 54 dBaCheck Sylvane

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Hathaspace HSP001350 Sq. ft.4 months21 – 43 dBaCheck Amazon
Blueair Blue Pure 411+185 Sq. ft.6 months17 – 46 dBaCheck Amazon
Honeywell HPA300456 Sq. ft.HEPA: 12 months / Odor: 3 months44 – 57 dBaCheck Amazon
RabbitAir MinusA2 SPA-780A815 Sq. ft.24 months25 – 51 dBaCheck Sylvane

Check Amazon

Tenergy Sorbi200 Sq. ft.6 months35 – 42 dBaCheck Amazon

Considerations When Buying Basement Air Purifiers

Filtration System

There are different types of air purification systems that use various filters. We recommend choosing between the Molekule proprietary PECO filter or a HEPA filter with activated carbon included. These two options are the best at removing airborne contaminants.

Most air purifiers have a one-filter, two-filter, or three-filter system. What matters most is the type of filter material used in your system. However, purchasing multiple filters may be expensive. Consider filter price when purchasing your air purifier.

Particle Removal Capacity

CADR is known as the clean air delivery rate, and it is the number of air exchanges per hour. In other words, the CADR tells homeowners how long it takes for the air to be completely replaced in a room. We recommend choosing an air purifier with a rating of 100 CFM at a minimum.

Basement Size vs. Coverage Area

Consider the size of your basement and determine how much coverage area your air purifier will need to provide. You may need to purchase two air purifiers to cover the entire space if you have a basement above 650/800 square feet. For optimal performance, you want to make sure that the square footage covered by your purifier(s) is equal to or greater than the square footage of your basement.

Modes of Operation

Air purifiers have a wide range of operation modes. Consider the type of sensors used and the notifications given. Does the air purifier alert you when a filter needs to be changed? What about when air quality is poor, and you need to circulate air at a higher speed? Also, pay attention to the ease of use. Are buttons within reach and easy to use?

Noise Level

Air purifiers make noise, and the decibel level depends on the type of unit you purchase. Most air purifiers have noise levels between 20 and 60 dBA. If you plan to run your air purifier on the highest level, we recommend choosing a quieter air purifier with an upper limit of 45/50 dBA.

Energy Efficiency & Operating Cost

When considering energy efficiency, check to see if the air purifier has an energy efficiency rating. Most air purifiers that qualify as energy efficient will have a certified rating. We also recommend considering how much the air purifier will cost to operate. When replacing filters, how often will you need to replace them and how much will it cost each time you do.

Build Quality & Aesthetics

Another consideration is the build quality and aesthetics of your air purifier. The higher the quality of materials used in building your air purifier, the longer it will last. Aesthetically, you may also want to consider how each air purifier model would fit in your home.

Price Vs. Usage

Consider the cost of the air purifier vs. the overall usage time. How often will you need to change the air purifier’s filters? What is the cost of each filter change? Consider the warranty as well. A more extended warranty may make up for the cost of a more expensive air purifier.

8 Best Air Purifiers for Basements Reviewed

1. Alen BreatheSmart Classic

Best Overall Air Purifier for Basement
Coverage Area1100 Sq. ft.
Filtration Type3 stages
Filtration Life12 months
Noise Level42 – 56 dB
Air Quality SensorYes

The Alen BreatheSmart Classic is the best overall air purifier for basement on our list. This air purifier model has everything you need to maintain healthy air quality for your home.

We chose this air purifier as our favorite because it’s aesthetically attractive for the home, has a mold and bacteria-specific filter to catch the most harmful pollutants, and is ultra quiet even when on the highest purification setting. The sleek modern aesthetic is chic and has a slim profile. Colors range from white, brushed stainless, espresso, weathered gray, rosewood, oak, maple, and graphite.

The mold and bacteria-specific filter can also be swapped out for a smoke & chemical filter, allergies & dust filter, or pet dander & odor filter. This filter is powerful and can clean an entire 1100 square foot space in as little as 30 minutes.

Al on AlenCorp wrote, “Just bought our second BreatheSmart unit with the HEPA Silver filter. My wife is very sensitive to mold and airborne toxins and she’s been feeling better with the units going 24/7.”

A few homeowners have said that the fan breaks down over time with this unit. However, this tends to be a wear and tear defect that can be fixed. The cost is also high on this unit, but with the high-quality build materials and a forever guarantee, we think the cost is more than worth it. This air purifier offers powerful filtration for a clean, healthy air home.


  • Large coverage area
  • Mold & Bacteria specific filter
  • Sleek, modern aesthetic
  • Nine color choices
  • Ultra Quiet


  • Fan breaks down
  • Expensive

2. Coway Airmega 400

Best Air Purifier for Large Basement
Coverage Area1560 Sq. ft.
Filtration Type2 stages
Filtration Life12 months
Noise Level22 – 55 dB
Air Quality SensorYes

The Coway Airmega 400 is the best air purifier for a large basement on our list. This air purifier can clean up to 1,560 square feet and tackle large basement spaces. White and black options exist to match decor, and the unit comes with a True HEPA filter. True HEPA filters capture 99.97% of all pollutants under 0.3 microns and are among the best filter options available on the market.

We liked that this unit tackled odors as well. A pre-filter grabs most of the larger particles while the filter cleans through small particles. Four legs prop this air filter off of the ground to make it easy to clean around the unit. This unit also has many different modes, including eco mode and quiet mode. An alert button shows when filters need to be replaced. This was a game-changer for us because we didn’t have to worry about forgetting to change dirty filters.

Unlike the Alen purifier unit, this model does not come with a forever guarantee. Instead, it comes with a limited warranty for 1 year on all internal parts and 5 years on all electronic parts. The Coway Airmega is energy star certified and will help you save money if you plan to run your air purifier year-round.


  • Cleans up to 1,560 square feet
  • Dual filer
  • Easy-to-clean


  • Only two colors
  • Limited warranty

3. Winix 5500-2

Best Air Purifier for Damp Basement
Coverage Area360 Sq. ft.
Filtration Type3 stages
Filtration Life12 months
Noise Level27 – 54 dB
Air Quality SensorYes

The Winix 5500-2 is the best air purifier for a damp basement. It is one of the most affordable units we’ve found that still comes with a True HEPA filter. It also has a washable carbon filter, which is great for removing VOCs and other odors. If you have a mold smell or damp odor, this machine will tackle it.

This model also comes with smart sensors that provide up-to-date information on the air quality and whether or not the filter needs to be changed. Sleep mode is a cool automatic feature where the air purifier notices when the ambient light in the room is low and adjusts to a sleep setting where the fan is low, and the indicator lights are also dimmed. PlasmaWave Technology uses three stages to purify the air for superior air quality with the basic pre-filter, HEPA filter, and washable carbon filter.

This air purifier has a one year limited warranty. This model also covers up to 360 square feet, which may not be enough to purify your entire basement. However, this unit is affordable and an excellent option for homeowners who want to purchase an inexpensive air purifier. We recommend this model for homeowners with damp basements that need an inexpensive way to continually circulate air.


  • Affordable
  • Washable carbon filter
  • Smart sensors
  • Sleep mode


  • Up to 360 square feet
  • Limited warranty

4. Hathaspace HSP001

Best Value for Money
Coverage Area350 Sq. ft.
Filtration Type5 stages
Filtration Life4 months
Noise Level21 – 43 dB
Air Quality SensorYes

The Hathaspace HSP001 is the best value for the money. It is a large ion purifier that eliminates odors, pet hair, and airborne pollutants. The filter system is a 5-in-1 model that includes a nano-cold catalyst filter, carbon filter, antibacterial filter, true HEPA filter, and then an ionizer.

This filter works to destroy 99.97% of allergens and reduce the presence of mold spores, pollen, dust mites, and pet dander in your home. The ionizer and carbon filter work together to minimize odors from chemicals and smoke that might make their way into your home. We loved that this purifier was affordable and still came with an auto-adjust mode and a true HEPA filter. This air purifier is perfect for a small space up to 350 square feet. Air is replaced approximately 48 times each day in this small space!

This air purifier has multiple filters to replace, which can be expensive. The clean air sensor is also sensitive to every small change in the room. This means that the sensor may change several times in a minute. If you do not want to see changing colors frequently, then this air purifier may not be for you. However, many homeowners appreciate the sensitivity of the air sensor. If you want an affordable purifier with a robust filtration system and ion setting, this is the best model.


  • Affordable
  • 5-in-1 Filter System
  • Ion (Ozone Safe)


  • Clean air sensor is sensitive
  • Multiple filters to replace

5. Blueair Blue Pure 411+

Best Air Purifier for Small Basements
Coverage Area185 Sq. ft.
Filtration Type3 stages
Filtration Life6 months
Noise Level17 – 46 dB
Air Quality SensorYes

The Blue Pure 411+ is the best air purifier for small basements. This purifier has a 3-stage filtration system with a carbon filter and a true HEPA filter for maximum purification. Reduce pollen, dust mites, pet dander, chemical odors, and dust with this air purifier unit.

We love that this air purifier model comes with six pre-filter color options so you can truly match the aesthetic of your home. These include black, blue, gray, yellow, pink, red, and the original white mesh. We also loved how quiet this air purifier is at just 46 dBA on the highest level. This is a great option for a bedroom as well as a basement.

A few homeowners have noted that it can be challenging to change the air filters, but others have said that the process is simple after getting used to it. This unit also covers 185 square feet and is best for a small space. If you have a large basement, you should purchase several units or buy a larger air purifier. We recommend this unit for small basements and homeowners who care about color choices. It is also one of the most affordable units on our list.


  • Quiet purifier
  • True HEPA filter and carbon filter
  • Six pre-filter color options


  • Small air cycling, limited area
  • Difficult filter change

6. Honeywell HPA300

Best Quiet Air Purifier for Basement Apartments
Coverage Area456 Sq. ft.
Filtration Type2 of stages
Filtration LifeHEPA: 12 months / Odor: 3 months
Noise Level44 – 57 dB
Air Quality SensorYes

The Honeywell HPA 300 is the best quiet air purifier for basement apartments. If you live in a basement apartment and need something powerful yet quiet, then this is it. This air purifier has a large coverage area and can purify up to 456 square feet five times per hour.

The filter system comes with a pre-filter to grab large particles while a true HEPA filter comes next to catch the smallest airborne pollutant particles. The display panel is easy-to-read and has a simple power button, turbo setting, and dimmer setting. It also has a display light that lets you know when to replace the filter or the pre-filter. The unit comes in both black and white to match your home decor.

One thing we loved about this air purifier is that it has a Bluetooth option. You can connect to a Bluetooth device to monitor your air purifier. This air purifier is not the cheapest option and is a mid-range choice.

A few homeowners said that replacing the filter was harder than they expected, and they didn’t like the process. If you have a large basement and you want a quiet air purifier that has both Bluetooth and a true HEPA filter, we recommend this purifier.


  • Auto timer options
  • Ample coverage of 456 sq. ft.
  • Bluetooth option
  • True HEPA filter


  • Filter replacement can be hard
  • Not cheap

7. RabbitAir MinusA2 SPA-780A

Best Air Purifier for Basement Smells
Coverage Area815 Sq. ft.
Filtration Type6 stages
Filtration Life24 months
Noise Level25 – 51 dB
Air Quality SensorYes

The RabbitAir MinusA2 SPA-780A is the best air purifier for basement smells. Do you have old smells in your home from pets, cigars, mold, or other chemicals? This air purifier deodorizes the room and eliminates odors. It comes with a BioGS HEPA filter as well as your choice of customized screen. Options include germ defense, pet allergy, toxin absorber, and odor remover.

The BioGS HEPA filter not only traps allergens below 0.3 microns but also traps more significant allergens to allow your filter to last longer. The BioGS HEPA filter material can reduce the buildup of allergens such as dust mites and pet dander that would normally be trapped on the filter. The six filter process includes a pre-filter, medium filter, BioGS HEPA filter, customized filter (your choice), charcoal-based activated carbon filter, and a negative ion generator.

The button panel is easy to view and easy to read. An indicator light signals the current air quality in the room. This air purifier comes in both black and white. However, homeowners noted that they would have preferred several color options to better match their home interiors. This air purifier is also one of the more expensive options on our list. If you can afford this option and need to remove basement smells, we recommend choosing this air purifier. This model also comes with an impressive five-year warranty, which can help make the cost of the purifier worth it.


  • Large coverage area up to 815 sq. ft.
  • Custom filter options
  • Five-year warranty
  • BioGS HEPA filter


  • Expensive
  • Limited color options

8. Tenergy Sorbi

Best Dehumidifier + Air Purifier for Basements
Coverage Area200 Sq. ft.
Filtration Type1 stage
Filtration Life6 months
Noise Level35 – 42 dB
Air Quality SensorYes

The Tenergy Sorbi is the best dehumidifier and air purifier for your basement. It is an affordable model and comes with a dehumidifier that can suck the moisture out of your basement. By grabbing moisture, your air will be more comfortable, and your home won’t have mold or mildew problems. A removable 1-liter water tank works around the clock to pull moisture from your air and lower humidity levels.

The purifier portion of the machine comes with a true HEPA filter to gather allergens, airborne contaminants, dust, and pet dander. This unit is also lightweight at just 7 lbs. and easy to move around your home.

This filter comes in white and includes a light indicator for air quality and water level as well as an auto-shutoff feature. This unit is whisper quiet and won’t make much noise even on the highest setting.

Homeowners have reported that this air purifier has a small filter size and is only one stage, so it may not capture as many contaminants as larger units. The coverage area is up to 200 square feet, which may not be large enough for bigger basements. If you need a dehumidifier and air purifier combination, we recommend this machine. We liked that we could clean the air and limit moisture intake at the same time.


  • Affordable
  • Lightweight
  • Dehumidifier


  • Small filter size, 1 stage
  • Small coverage area, up to 200 sq. ft.

Air Purifier Vs Dehumidifier for Basements

Air purifiers and dehumidifiers are great devices for keeping your basement air clean; however, both machines work in different ways. An air purifier works to keep your air clean by reducing or eliminating airborne pollutants.

An air purifier will help remove musty odors and chemical odors, keep allergies and asthma symptoms at bay and provide cleaner air for homeowners to breathe. A dehumidifier will remove humidity from the air and make it less likely that mold will form. Dehumidifiers can help keep your basement moisture-free.

If you suffer primarily from allergies, dust, and odors, we recommend purchasing an air purifier first. If you find that your basement has excess moisture, then we recommend purchasing a dehumidifier first. Most homeowner’s basements would benefit from an air purifier and a dehumidifier.

Ways of Keeping Basement Air Clean

You can take several steps as a homeowner to keep your basement air clean: improving air ventilation, fixing leaking pipes, dusting your home often, decreasing humidity with a dehumidifier or AC unit, and using an air purifier.

Drying out the basement with an air purifier and AC unit will help to prevent condensation and, therefore, mold. Using an air purifier will help filter out airborne pollutants from dust, lint, pet dander, and even mold spores.

People Also Ask (FAQ)

Why does mold grow in basements?

Mold typically grows in basements because of water problems. Flooding in basements occurs in areas with significant rainfall, and leaky pipes can also contribute to mold. Basements also frequently have high humidity, and when there are cold temperatures outdoors, this leads to condensation and mold.

How do I know which size air purifier to get for my basement?

The size of the air purifier that you need for your basement depends on the size of your basement. Each air purifier listed has a square footage rating. Make sure that your basement falls within the square footage rating of the air purifier you like best. If your basement is 650+ square feet, you may need two air purifiers for your space to get the best purifying results.

How long should I run an air purifier for the basement?

We recommend running your air purifier at full speed for a few hours (3-6) every day. Then, you can place your air purifier at a lower speed for maintenance. Dust, lint, pet dander, mold spores, and other airborne pollutants will continue to accumulate as the day goes on. We recommend running your air purifier at all times, 24/7.

What’s the best way to deodorize basements?

The best way to deodorize your basement is to remove mold, fix any leaking pipes, add a fan, pull moisture from the basement air using a dehumidifier, and use activated charcoal. An air purifier can also remove VOCs and eliminate chemical smells in the air while cleaning the air.

What are some other tips for using air purifiers in home basements?

Your air purifier will offer better results if you place it in an ideal location. An ideal location for an air purifier in the basement is in the area of the basement that is used most. Ensure that your air purifier is 2-6 feet away from the wall so that air can easily be filtered in and out.


Air purifiers are a great way to clean your basement air and reduce mold spores, dust, pet dander, lint, and VOCs. We recommend the Alen BreatheSmart Classic because it is modern, sleek, durable, includes customizable filter options, and is easy-to-use. It also uses true HEPA filters for powerful purification with 99.97% of particles below .3 microns eliminated and comes with a forever guarantee from Alen.